<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>

  <body>
    <script>
      function Star(uname, age) {
        this.uname = uname
        this.age = age
      }
      Star.prototype.sing = function () {
        console.log("我会唱歌")
      }
      // Object.prototype.sex = '男';
      Star.prototype.sex = "男"
      var shiyuan = new Star("石原里美", 18)
      shiyuan.sex = "女"
      console.log(shiyuan.sex)
      console.log(Object.prototype)
      console.log(shiyuan)
      console.log(Star.prototype)
      console.log(shiyuan.toString())
    </script>
  </body>
</html>
